Hi Benoist,
After you register, you should be able to hear the sound output. The oscillator is always on, as if you were using the module itself, so we've also provided a mute button near the output level control in case you want to turn it off again.
We should also note that oscillators 1 and 2 are panned left and right, but you can use the "m" mono button to pan them center. That way you can work on a layered sound, or disable either oscillator to work on the other one individually.
Overall, it shouldn't feel too limited. It is meant to edit the presets for the Waverazor Dual Oscillator Eurorack module, and it contains all the parameters in a module preset, plus deeper access to modulation matrix routings than you can get in the hardware.
Hope that helps! If you have any other questions or concerns, we're here and will respond as soon as possible.
All the best,
Taiho
MOK